/**
 * File EaseInInterpolator.java
 * ---------------------------------------------------------
 *
 * Copyright (C) 2012 David Bauske (david.bauske@googlemail.com)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package net.cl.util.anim;

/**
 * Performs a square interpolation.
 *
 * Note that this class is a enum-based singleton. Use
 * EaseInInterpolator.INSTANCE to obtain the class's instance.
 *
 * @author David
 */
public enum EaseInInterpolator implements Interpolator
{
	INSTANCE;

	/**
	 * Computes <tt>x^2</tt>.
	 * {@inheritDoc}
	 */
	@Override
	public double getInterpolationValue(
			double pPercentage,
			double pStartVal,
			double pEndVal)
	{
		double range = pEndVal - pStartVal;
		double square = Math.pow(pPercentage, 2);
		return pStartVal + square * range;
	}

	@Override
	public String toString()
	{
		return getClass().getSimpleName();
	}
}
